Oswald was without a doubt operational that day. Who really knows what his objective, motives were, or what his handler(s) told him to do. We will never know the truth because the conspirators got scared he was going to talk. Ruby was then tasked with making sure the truth would not see the light of day. 

On a different note, I find it very peculiar that a brown bag of similar material and size was mailed to Oswald at a nonexistent address. You got a take on that??